"For the past several months, we have already made changes and are seriously ramping up our efforts".
The Obama Justice Department brought more leaks cases than all its predecessors combined.
Sessions on Friday said that "no government can be effective when its leaders cannot discuss freely with foreign leaders".
Also, Sessions said the Federal Bureau of Investigation "has created a new counterintelligence unit to manage these cases". "At their suggestion, one of the things we are doing is reviewing policies for effecting media subpoenas".
"I've listened to our career investigators, FBI agents and others, and of prosecutors about how to most successfully investigate and prosecute these matters", Sessions said.
At a press conference, Sessions said, "I have listened to career investigators and prosecutors about how to most successfully investigate and prosecute these matters".
But Berry says Albuquerque has been seeking to work with immigration authorities since he took office in 2009 and vehemently denied Albuquerque was a "sanctuary" city.
"This nation must end the culture of leaks".
In addition, Sessions said that after meeting with Federal Bureau of Investigation and intelligence investigators, the Justice Department would review its policies affecting media subpoenas.
"Any disclosure outside of authorized channels is a criminal offense and we will simply not tolerate the illegal release of classified information", Coats said.
The Department of Justice said Friday it was reviewing its policies on subpoenaing reporters in investigations of information leaks, a move that could compel journalists to break confidential agreements with sources or face legal consequences.
"Anyone who engages in these criminal acts is betraying the intelligence community and the American people", Coats said.
Dan Coats, the director of national intelligence, promised that he would help with the crackdown.
"From aggressively pursuing the leaking of classified information that puts innocent Americans at risk, to efforts that will secure our borders, to cracking on down on drugs and gangs, and especially being more supportive of local and national law enforcement, the DOJ under Jeff Sessions has been a breath of fresh air and he will make all Americans proud", said former Sen.
"We will find out, we will investigate you, we will prosecute you to the fullest extent of the law and you will not be happy with the result", he said. "Leaks to the media are not whistleblowing", Rosenstein said. "This is really incensing the people who are here to serve and that begins with the president and the vice president, our cabinet [and] our chiefs of staff", said Conway.
"I strongly agree with the president and condemn in the strongest terms the staggering number of leaks undermining the ability of our government to protect this country", Sessions, under mounting pressure from Trump, told reporters.
Coates noted DNI is strengthening the security clearence application process is order to prevent potential leakers from gaining access to classified information in the first place.